JPS6440480U

JPS6440480U -

Info

Publication number: JPS6440480U
Application number: JP11979887U
Authority: JP
Priority date: 1987-09-04
Filing date: 1987-09-04
Publication date: 1989-03-10

Description

[Brief explanation of the drawing]

第１図から第４図は本考案の実施例に係り、第
１図はクラツチ機構の説明図、第２図は駆動時の
クラツチ機構説明図、第３図は下糸巻き時のクラ
ツチ機構説明図、第４図はクラツチ爪とクラツチ
板との係合説明図、第５図と第６図は従来のクラ
ツチ機構の説明図であり、１は上軸、２はクラツ
チ板、４はハズミ車、５はクラツチ爪、６はバネ
、７は操作体である。 Figures 1 to 4 relate to an embodiment of the present invention, with Figure 1 being an explanatory diagram of the clutch mechanism, Figure 2 being an explanatory diagram of the clutch mechanism during driving, and Figure 3 being an explanatory diagram of the clutch mechanism during bobbin winding. , FIG. 4 is an explanatory diagram of the engagement between the clutch pawl and the clutch plate, and FIGS. 5 and 6 are explanatory diagrams of the conventional clutch mechanism, where 1 is an upper shaft, 2 is a clutch plate, 4 is a handwheel, 5 is a clutch pawl, 6 is a spring, and 7 is an operating body.

Claims

[Scope of utility model registration request]

an upper shaft rotatably supported on the sewing machine frame; a clutch plate fixed to the upper shaft and forming an engagement groove and a groove stopper on the side of the outer circumference; a knurl which is disposed between a fixed thrust stopper member, is rotatably fitted to the upper shaft, forms a transmission section on its outer periphery for connection to a drive source, and engages and drives a bobbin winding device on its side surface; a handwheel, the handwheel is fitted in an axial groove provided in the handwheel so as to be movable in the axial direction, the handwheel is disposed between the handwheel and the clutch plate, and is engageable in the groove of the clutch plate. A clutch pawl, a spring disposed between the clutch pawl and the handwheel, and a cam portion at the tip of the clutch pawl that engages with the handwheel and act on the clutch pawl to move the clutch pawl into the engagement groove of the clutch plate. and a second position where the clutch pawl is engaged with the engagement groove of the clutch plate by the cam portion and the spring. A clutch mechanism for a sewing machine, characterized in that when the operating body is in the second position, the clutch pawl is disposed so as to come into contact with a groove stopper of the engagement groove of the clutch plate and to have a gap with the cam portion of the operating body. .